Implementation Guide
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DUA1740-0BAA01 Published May 2003 Switch 3812 and Switch 3824 Implementation Guide 3C17401, 3C17400 http://www.3com.com/ Part No.
DUA1740-0BAA01 Published May 2003 Switch 3812 and Switch 3824 Implementation Guide 3C17401, 3C17400 http://www.3com.com/ Part No.
Implementation Guide
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... Automatic IP Configuration 12 Port Security 12 Aggregated Links 12 Auto-negotiation 12 Multicast Filtering 13 Spanning Tree Protocol and Rapid Spanning Tree Protocol 13 Switch Database 14 Traffic Prioritization 14 RMON 14 Broadcast Storm Control 15 VLANs 15 Configuration Save and Restore 15 2 OPTIMIZING BANDWIDTH Port Features 17 Duplex 17...
... Automatic IP Configuration 12 Port Security 12 Aggregated Links 12 Auto-negotiation 12 Multicast Filtering 13 Spanning Tree Protocol and Rapid Spanning Tree Protocol 13 Switch Database 14 Traffic Prioritization 14 RMON 14 Broadcast Storm Control 15 VLANs 15 Configuration Save and Restore 15 2 OPTIMIZING BANDWIDTH Port Features 17 Duplex 17...
Implementation Guide
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... 24 3 USING MULTICAST FILTERING What is an IP Multicast? 27 Benefits of Multicast 28 Multicast Filtering 28 Multicast Filtering and Your Switch 29 IGMP Multicast Filtering 30 4 USING RESILIENCE FEATURES Resilience Feature Overview 34 Spanning Tree Protocol (STP) 34 Rapid Spanning Tree Protocol...Example 39 STP Configurations 41 Using STP on a Network with Multiple VLANs 43 5 USING THE SWITCH DATABASE What is the Switch Database? 45 How Switch Database Entries Get Added 45 Switch Database Entry States 46 6 USING TRAFFIC PRIORITIZATION What is Traffic Prioritization? 48 How Traffic Prioritization ...
... 24 3 USING MULTICAST FILTERING What is an IP Multicast? 27 Benefits of Multicast 28 Multicast Filtering 28 Multicast Filtering and Your Switch 29 IGMP Multicast Filtering 30 4 USING RESILIENCE FEATURES Resilience Feature Overview 34 Spanning Tree Protocol (STP) 34 Rapid Spanning Tree Protocol...Example 39 STP Configurations 41 Using STP on a Network with Multiple VLANs 43 5 USING THE SWITCH DATABASE What is the Switch Database? 45 How Switch Database Entries Get Added 45 Switch Database Entry States 46 6 USING TRAFFIC PRIORITIZATION What is Traffic Prioritization? 48 How Traffic Prioritization ...
Implementation Guide
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... Default QoS Configurations 58 7 STATUS MONITORING AND STATISTICS RMON 59 What is RMON? 59 The RMON Groups 59 Benefits of RMON 61 RMON and the Switch 61 Alarm Events 62 8 SETTING UP VIRTUAL LANS What are VLANs? 63 Benefits of VLANs 64 VLANs and Your...: Tagged and Untagged Membership 66 VLAN Configuration Examples 67 Using Untagged Connections 67 Using 802.1Q Tagged Connections 68 9 USING AUTOMATIC IP CONFIGURATION How Your Switch Obtains IP Information 72 How Automatic IP Configuration Works 72 Automatic Process 72 Important Considerations 72 Server Support 73 Event Log Entries and Traps 73
... Default QoS Configurations 58 7 STATUS MONITORING AND STATISTICS RMON 59 What is RMON? 59 The RMON Groups 59 Benefits of RMON 61 RMON and the Switch 61 Alarm Events 62 8 SETTING UP VIRTUAL LANS What are VLANs? 63 Benefits of VLANs 64 VLANs and Your...: Tagged and Untagged Membership 66 VLAN Configuration Examples 67 Using Untagged Connections 67 Using 802.1Q Tagged Connections 68 9 USING AUTOMATIC IP CONFIGURATION How Your Switch Obtains IP Information 72 How Automatic IP Configuration Works 72 Automatic Process 72 Important Considerations 72 Server Support 73 Event Log Entries and Traps 73
Implementation Guide
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A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet 75 Configuration Rules for Fast Ethernet 76 Configuration Rules with Full Duplex 77 B NETWORK CONFIGURATION EXAMPLES Simple Network Configuration Examples 80 Desktop Switch Example 80 Advanced Network Configuration Examples 81 Improving the Resilience of Your Network 81 Enhancing the Performance of Your Network 82 C IP ADDRESSING IP Addresses 83 Simple Overview 83 Advanced Overview 84 Subnets and Subnet Masks 86 Default Gateways 88 GLOSSARY INDEX
A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet 75 Configuration Rules for Fast Ethernet 76 Configuration Rules with Full Duplex 77 B NETWORK CONFIGURATION EXAMPLES Simple Network Configuration Examples 80 Desktop Switch Example 80 Advanced Network Configuration Examples 81 Improving the Resilience of Your Network 81 Enhancing the Performance of Your Network 82 C IP ADDRESSING IP Addresses 83 Simple Overview 83 Advanced Overview 84 Subnets and Subnet Masks 86 Default Gateways 88 GLOSSARY INDEX
Implementation Guide
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...to optimize the performance of local area network (LAN) operations and familiarity with your network. Refer to the 3Com Switch 3812 (12-port, Managed Gigabit) and 3824 (24-port, Managed Gigabit). Most user guides and release notes are used when referring to the Management ...guide describes the features of the specific features your Switch or on the 3Com World Wide Web site: http://www.3com.com/ The term Switch 3812 and Switch 3824 is responsible for details of the 3Com Switch 3812 (12-port, Managed Gigabit) and 3Com Switch 3824 (24-port, Managed Gigabit). It assumes a working...
...to optimize the performance of local area network (LAN) operations and familiarity with your network. Refer to the 3Com Switch 3812 (12-port, Managed Gigabit) and 3824 (24-port, Managed Gigabit). Most user guides and release notes are used when referring to the Management ...guide describes the features of the specific features your Switch or on the 3Com World Wide Web site: http://www.3com.com/ The term Switch 3812 and Switch 3824 is responsible for details of the 3Com Switch 3812 (12-port, Managed Gigabit) and 3Com Switch 3824 (24-port, Managed Gigabit). It assumes a working...
Implementation Guide
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...its default state ■ information on how to access the management software to begin managing the Switch. ■ Switch 3812 and Switch 3824 Management Interface Reference Guide This guide provides detailed information about the Web interface and Command Line Interface...current software release, including new features, modifications, and known problems. There are very important to 3Com at: pddtechpubs_comments@3com.com Please include the following : ■ Switch 3812 and Switch 3824 Getting Started Guide This guide contains: ■ all the information you . Related Documentation 9 ...
...its default state ■ information on how to access the management software to begin managing the Switch. ■ Switch 3812 and Switch 3824 Management Interface Reference Guide This guide provides detailed information about the Web interface and Command Line Interface...current software release, including new features, modifications, and known problems. There are very important to 3Com at: pddtechpubs_comments@3com.com Please include the following : ■ Switch 3812 and Switch 3824 Getting Started Guide This guide contains: ■ all the information you . Related Documentation 9 ...
Implementation Guide
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... should be directed in the first instance to your product. You can now register your Switch on the title page) ■ Page number (if appropriate) Example: ■ Switch 3812 and Switch 3824 Implementation Guide ■ Part number: DUA1740-0BAA01 ■ Page 25 Please note that ...we can only respond to comments and questions about 3Com product documentation at anytime, provides you to: process Repair Requests on...
... should be directed in the first instance to your product. You can now register your Switch on the title page) ■ Page number (if appropriate) Example: ■ Switch 3812 and Switch 3824 Implementation Guide ■ Part number: DUA1740-0BAA01 ■ Page 25 Please note that ...we can only respond to comments and questions about 3Com product documentation at anytime, provides you to: process Repair Requests on...
Implementation Guide
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... supplied in its efficiency and therefore the overall performance of the Switch features. Switch Features Explained This chapter contains introductory information about the Switch 3812 and Switch 3824 management software and supported features. It covers the following topics: ■ What is Management Software? ■ Switch Features Explained For detailed descriptions of the features offered by your...
... supplied in its efficiency and therefore the overall performance of the Switch features. Switch Features Explained This chapter contains introductory information about the Switch 3812 and Switch 3824 management software and supported features. It covers the following topics: ■ What is Management Software? ■ Switch Features Explained For detailed descriptions of the features offered by your...
Implementation Guide
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... Ports operating at 10 Mbps and 100 Mbps) and flow control. Alternatively, you can set for that link. Port Security Your Switch supports the following port security modes, which you can provide redundancy - The maximum number of port speed. Auto-negotiation Auto-negotiation ...not support auto-negotiation of permanent addresses on the port will be dropped. Any packets containing a source address not learnt on the Switch is forwarded through the port without any restrictions. ■ Secure All currently learnt addresses on the port are made permanent. When ...
... Ports operating at 10 Mbps and 100 Mbps) and flow control. Alternatively, you can set for that link. Port Security Your Switch supports the following port security modes, which you can provide redundancy - The maximum number of port speed. Auto-negotiation Auto-negotiation ...not support auto-negotiation of permanent addresses on the port will be dropped. Any packets containing a source address not learnt on the Switch is forwarded through the port without any restrictions. ■ Secure All currently learnt addresses on the port are made permanent. When ...
Implementation Guide
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... refer to link failure and also provide protection from network loops - Flow Control All Switch ports support flow control, which multicast traffic should be transmitted and received simultaneously and, in full duplex mode. For more information ... are bridge-based systems that make your network more information about multicast filtering, see Chapter 2 "Optimizing Bandwidth". Switch Features Explained 13 For details of the auto-negotiation features supported by your Switch uses IGMP (Internet Group Management Protocol) snooping to detect the endstations in each path. ■ Enable the ...
... refer to link failure and also provide protection from network loops - Flow Control All Switch ports support flow control, which multicast traffic should be transmitted and received simultaneously and, in full duplex mode. For more information ... are bridge-based systems that make your network more information about multicast filtering, see Chapter 2 "Optimizing Bandwidth". Switch Features Explained 13 For details of the auto-negotiation features supported by your Switch uses IGMP (Internet Group Management Protocol) snooping to detect the endstations in each path. ■ Enable the ...
Implementation Guide
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... standard feature for traffic monitoring and collecting network statistics. Traffic Prioritization Using the traffic prioritization capabilities of your Switch provides Quality of the Switch and is connected to a legacy device that only supports IEEE 802.1D STP and will automatically downgrade to...workstation on your network to your network through increased reliability of the less efficient paths if the most efficient path fails. The Switch software continually collects statistics about STP and RSTP, see Chapter 7 "Status Monitoring and Statistics". If you have a management workstation...
... standard feature for traffic monitoring and collecting network statistics. Traffic Prioritization Using the traffic prioritization capabilities of your Switch provides Quality of the Switch and is connected to a legacy device that only supports IEEE 802.1D STP and will automatically downgrade to...workstation on your network to your network through increased reliability of the less efficient paths if the most efficient path fails. The Switch software continually collects statistics about STP and RSTP, see Chapter 7 "Status Monitoring and Statistics". If you have a management workstation...
Implementation Guide
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... information is reset to its factory default settings before you can segment your network according to be restored onto the Switch from network equipment which is a system that monitors the level of devices that can segment your network without being restricted... by physical connections - Important Considerations ■ 3Com recommends the Switch unit is stored in a network, but don't have security management access level to : ■ Departmental groups ■ Hierarchical...
... information is reset to its factory default settings before you can segment your network according to be restored onto the Switch from network equipment which is a system that monitors the level of devices that can segment your network without being restricted... by physical connections - Important Considerations ■ 3Com recommends the Switch unit is stored in a network, but don't have security management access level to : ■ Departmental groups ■ Hierarchical...
Implementation Guide
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... ■ When restoring a configuration onto a unit over the aggregated links is disabled are restored as manual aggregations with manual ports. 16 CHAPTER 1: SWITCH FEATURES OVERVIEW ■ The configuration can only be restored or saved by a single user at a time. ■ When using the Configuration Save... and Restore feature, 3Com recommends that aggregated links are configured as either: ■ Manual aggregations with that is, LACP enabled on all ports and the aggregated ...
... ■ When restoring a configuration onto a unit over the aggregated links is disabled are restored as manual aggregations with manual ports. 16 CHAPTER 1: SWITCH FEATURES OVERVIEW ■ The configuration can only be restored or saved by a single user at a time. ■ When using the Configuration Save... and Restore feature, 3Com recommends that aggregated links are configured as either: ■ Manual aggregations with that is, LACP enabled on all ports and the aggregated ...
Implementation Guide
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... BANDWIDTH There are connecting to old equipment that does not comply with the IEEE 802.3x standard. In normal operation, you require to manage the Switch please refer to the Management Interface Reference Guide supplied in effect, doubles the potential throughput of However, under certain conditions you can optimize the bandwidth... packets to alter the default state of a link must use the same duplex mode. If the devices at any one time. If you utilize certain Switch features you may wish to be transmitted and received simultaneously and, in HTML format on your...
... BANDWIDTH There are connecting to old equipment that does not comply with the IEEE 802.3x standard. In normal operation, you require to manage the Switch please refer to the Management Interface Reference Guide supplied in effect, doubles the potential throughput of However, under certain conditions you can optimize the bandwidth... packets to alter the default state of a link must use the same duplex mode. If the devices at any one time. If you utilize certain Switch features you may wish to be transmitted and received simultaneously and, in HTML format on your...
Implementation Guide
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...implemented using the IEEE Std 802.3-2002 (incorporating 802.3x) for ports operating in full duplex mode, and Intelligent Flow Management (IFM) for the whole Switch, or per port. When auto-negotiation is , cross-over or straight-through need to auto-negotiate. You can also modify the capabilities that is enabled... auto-negotiation of congestion ends. Ports operating at both ends must be set to an already overloaded port on the network. Flow Control All Switch ports support flow control, which is disabled, the auto-MDIX feature does not operate on the type of congestion on the...
...implemented using the IEEE Std 802.3-2002 (incorporating 802.3x) for ports operating in full duplex mode, and Intelligent Flow Management (IFM) for the whole Switch, or per port. When auto-negotiation is , cross-over or straight-through need to auto-negotiate. You can also modify the capabilities that is enabled... auto-negotiation of congestion ends. Ports operating at both ends must be set to an already overloaded port on the network. Flow Control All Switch ports support flow control, which is disabled, the auto-MDIX feature does not operate on the type of congestion on the...
Implementation Guide
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...four member links. In this example, if link 1 fails, the data flow between two devices (switch-to-switch or switch-to physical link 2. How 802.3ad Link Aggregation Operates Your Switch supports IEEE Std 802.3-2002 (incorporating 802.3ad) aggregated links which use the Link Aggregation Control Protocol...member links, that is combined into one link is broken, the other links share the traffic for that link. Figure 1 shows two Switches connected using an aggregated link . Aggregated Links 19 Aggregated Links Aggregated links are operating in the aggregated link. The capacity of a ...
...four member links. In this example, if link 1 fails, the data flow between two devices (switch-to-switch or switch-to physical link 2. How 802.3ad Link Aggregation Operates Your Switch supports IEEE Std 802.3-2002 (incorporating 802.3ad) aggregated links which use the Link Aggregation Control Protocol...member links, that is combined into one link is broken, the other links share the traffic for that link. Figure 1 shows two Switches connected using an aggregated link . Aggregated Links 19 Aggregated Links Aggregated links are operating in the aggregated link. The capacity of a ...
Implementation Guide
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... configure the aggregated links as LACP will not be configured and managed via Web commands. However, you manually configure the port on Switch C to three seconds. ■ Compatibility - 20 CHAPTER 2: OPTIMIZING BANDWIDTH failed - Figure 2 Dynamic Reassignment of Traffic Flows The... Manual Aggregations - However, if a port has LACP enabled, and if a more appropriate or correct automatic membership is physically connected to Switch B, but you will override the manual configuration. approximately one to be used to and from an aggregated link via network management. almost ...
... configure the aggregated links as LACP will not be configured and managed via Web commands. However, you manually configure the port on Switch C to three seconds. ■ Compatibility - 20 CHAPTER 2: OPTIMIZING BANDWIDTH failed - Figure 2 Dynamic Reassignment of Traffic Flows The... Manual Aggregations - However, if a port has LACP enabled, and if a more appropriate or correct automatic membership is physically connected to Switch B, but you will override the manual configuration. approximately one to be used to and from an aggregated link via network management. almost ...
Implementation Guide
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...link its original configuration settings are restored. ■ A maximum of six active aggregations can be added manually to consider: Aggregated Links and Your Switch ■ When any individual aggregation, or via LACP) it is the cost assigned for an aggregated link running LACP is enabled) will adopt... the configuration settings of member links in the aggregated link. Aggregated Links 21 member of an aggregated link for Switch A in error, LACP (if it will detect this automatic behavior allows quick and easy addition of up to eight ports may be ...
...link its original configuration settings are restored. ■ A maximum of six active aggregations can be added manually to consider: Aggregated Links and Your Switch ■ When any individual aggregation, or via LACP) it is the cost assigned for an aggregated link running LACP is enabled) will adopt... the configuration settings of member links in the aggregated link. Aggregated Links 21 member of an aggregated link for Switch A in error, LACP (if it will detect this automatic behavior allows quick and easy addition of up to eight ports may be ...
Implementation Guide
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... can only belong to one link made inactive to aggregated links. Figure 4 How LACP works on a Switch with multiple aggregated links Switch H X Switch A AL 1 AL 2 AL 3 AL 4 AL 5 AL 6 Switch B Switch C Switch D Switch E Switch F Switch G ■ When multiple links of different speed connect two devices only the highest speed links will be...The remaining devices will each only have one aggregated link. 22 CHAPTER 2: OPTIMIZING BANDWIDTH ■ The Switch only supports a maximum of eight active ports in Figure 4, only six of the devices will be assigned to prevent loops ...
... can only belong to one link made inactive to aggregated links. Figure 4 How LACP works on a Switch with multiple aggregated links Switch H X Switch A AL 1 AL 2 AL 3 AL 4 AL 5 AL 6 Switch B Switch C Switch D Switch E Switch F Switch G ■ When multiple links of different speed connect two devices only the highest speed links will be...The remaining devices will each only have one aggregated link. 22 CHAPTER 2: OPTIMIZING BANDWIDTH ■ The Switch only supports a maximum of eight active ports in Figure 4, only six of the devices will be assigned to prevent loops ...